\Bibitem{GneSirBol66} \by B.~V.~Gnedenko, S.~Kh.~Sirazhdinov, V.~G.~Boltyanskii \paper Tashmukhamed Alievich Sarymsakov (on the occasion of his fiftieth birthday) \jour Russian Math. Surveys \yr 1966 \vol 21 \issue 3 \pages 223--228 \mathnet{http://mi.mathnet.ru/eng/rm5884} \crossref{https://doi.org/10.1070/RM1966v021n03ABEH004160} \zmath{https://zbmath.org/?q=an:0147.24413}